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Main reactions determining heat evolution in hydrogen-oxygen combustion

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Abstract

The contributions from various elementary reactions to the overall heat evolution rate in the propagation of hydrogen-air flames at atmospheric pressure have been determined. The study has been carried out by solving the system of kinetic equations and a heat balance equation, involving component concentration and temperature data available from the literature. The key role in heat evolution and in the propagation of the steady-state combustion wave is played by the set of reactions that lead to reaction chain branching. The contribution from the hydrogen atom recombination reaction to the overall heat evolution does not exceed 7% even for rich mixtures and cannot ensure flame propagation without contributions from other exothermic reactions.

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Authors and Affiliations

  1. Institute of Structural Macrokinetics and Materials Research Problems, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia

    V. V. Azatyan

  2. Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia

    Z. S. Andrianova & A. N. Ivanova

  3. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, 119991, Russia

    A. A. Borisov

Authors
  1. V. V. Azatyan
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  2. Z. S. Andrianova
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  3. A. A. Borisov
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  4. A. N. Ivanova
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Correspondence to V. V. Azatyan.

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Original Russian Text © V.V. Azatyan, Z.S. Andrianova, A.A. Borisov, A.N. Ivanova, 2012, published in Kinetika i Kataliz, 2012, Vol. 53, No. 6, pp. 683–689.

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Azatyan, V.V., Andrianova, Z.S., Borisov, A.A. et al. Main reactions determining heat evolution in hydrogen-oxygen combustion. Kinet Catal 53, 641–647 (2012). https://doi.org/10.1134/S002315841206002X

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  • DOI: https://doi.org/10.1134/S002315841206002X

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